Anode Heel Effect Flashcards
anode heel effect
radiographic phenomenon affecting the intensity of the x-ray beam causing x-ray photons to be absorbed
the anode angle will increase the surface area of the ______ _____ and will therefore increase the ability of anode to _________ _____.
focal spot
absorb heat
the anode angle will decrease the _____ size which will increase ________ ___________.
EFS
spatial resolution
a larger number of x-ray photons will be produced at the cathode side of the x-ray tube due to what?
the angle of the anode
Why does the cathode side have a higher intensity than the anode side?
the absorption of the photons deep in the anode heel
What produces the anode heel effect?
a number of photons deep in the anode never escape the target so they are absorbed in the anode heel
variables affecting anode heel effect
SID
anode target angle
image field size
The relationship between the anode heel effect and the SID is what?
indirect
What does less angle mean?
more anode that a photon needs to escape to become part of the beam
What does more angle mean?
less anode that a photon needs to escape to become part of the beam
The relationship between the anode angle and anode heel effect is what?
indirect
The relationship between the field size and anode heel effect is what?
direct
What can happen when the anode heel effect causes a variation of intensity of photons across the x-ray field?
uneven exposure to the IR
FAT CAT
place the thickest part of the patient underneath the cathode end of the x-ray tube
Why do you place the thickest part under the cathode end?
it will provide a greater number of photons to penetrate and image the thicker parts
